• Eur J Anaesthesiol · Apr 2005

    Randomized Controlled Trial Comparative Study Clinical Trial

    A combination of lidocaine and nitrous oxide in oxygen is more effective in preventing pain on propofol injection than either treatment alone.

    • A Niazi, E Galvin, I Elsaigh, Z Wahid, D Harmon, and I Leonard.
    • Beaumont Hospital, Department of Anaesthesia and Intensive Care Medicine, Dublin, Ireland. ahtshamniazi@hotmail.com
    • Eur J Anaesthesiol. 2005 Apr 1;22(4):299-302.

    Background And ObjectivePropofol is an intravenous (i.v.) anaesthetic agent that possesses many of the qualities of an ideal anaesthetic agent. The most significant side-effect associated with propofol is pain on injection. Despite optimal therapy, the incidence of pain on propofol injection remains a problem. This prospective, randomized, double blinded study evaluated the effect of three different treatment strategies in decreasing pain on propofol injection.MethodsWe studied 102 adult, ASA I-II patients, scheduled for elective surgical procedures. Combination of i.v. lidocaine and nitrous oxide (N2O) in oxygen (O2) inhalation pre-treatment was compared with either treatment alone in the prevention of pain on propofol injection. A standard propofol injection technique and scoring system, to measure the pain on injection was used.ResultsDemographic variables were similar between the groups. The incidence of no pain on propofol injection was similar in the lidocaine and N2O groups (63.6% vs. 57.5%) (95% confidence interval (CI): 0.17-0.29, P = 0.61). Combination therapy was associated with a greater incidence of no pain on injection (84% vs. 63.6%) (95% CI: 0.06-0.48, P = 0.04).ConclusionCombination of i.v. lidocaine and N2O in O2 inhalation pre-treatment is more effective than either treatment alone in decreasing pain on propofol injection.

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